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odp-execute: Refactor determining dpif assistance.

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To be more explicit about which actions require datapath assistance,
split this out into a separate function. While this is fairly trivial
currently, there will be more special cases for the upcoming conntrack
changes.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Joe Stringer
2015-03-06 10:09:10 -08:00
parent b440dd8cd4
commit db8bb9a51e
1 changed files with 41 additions and 8 deletions
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49
lib/odp-execute.c
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@@ -464,6 +464,38 @@ odp_execute_sample(void *dp, struct dp_packet *packet, bool steal,
nl_attr_get_size(subactions), dp_execute_action);
}
static bool
requires_datapath_assistance(const struct nlattr *a)
{
enum ovs_action_attr type = nl_attr_type(a);
switch (type) {
/* These only make sense in the context of a datapath. */
case OVS_ACTION_ATTR_OUTPUT:
case OVS_ACTION_ATTR_TUNNEL_PUSH:
case OVS_ACTION_ATTR_TUNNEL_POP:
case OVS_ACTION_ATTR_USERSPACE:
case OVS_ACTION_ATTR_RECIRC:
return true;
case OVS_ACTION_ATTR_SET:
case OVS_ACTION_ATTR_SET_MASKED:
case OVS_ACTION_ATTR_PUSH_VLAN:
case OVS_ACTION_ATTR_POP_VLAN:
case OVS_ACTION_ATTR_SAMPLE:
case OVS_ACTION_ATTR_HASH:
case OVS_ACTION_ATTR_PUSH_MPLS:
case OVS_ACTION_ATTR_POP_MPLS:
return false;
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
OVS_NOT_REACHED();
}
return false;
}
void
odp_execute_actions(void *dp, struct dp_packet **packets, int cnt, bool steal,
const struct nlattr *actions, size_t actions_len,
@@ -477,13 +509,7 @@ odp_execute_actions(void *dp, struct dp_packet **packets, int cnt, bool steal,
int type = nl_attr_type(a);
bool last_action = (left <= NLA_ALIGN(a->nla_len));
switch ((enum ovs_action_attr) type) {
/* These only make sense in the context of a datapath. */
case OVS_ACTION_ATTR_OUTPUT:
case OVS_ACTION_ATTR_TUNNEL_PUSH:
case OVS_ACTION_ATTR_TUNNEL_POP:
case OVS_ACTION_ATTR_USERSPACE:
case OVS_ACTION_ATTR_RECIRC:
if (requires_datapath_assistance(a)) {
if (dp_execute_action) {
/* Allow 'dp_execute_action' to steal the packet data if we do
* not need it any more. */
@@ -497,8 +523,10 @@ odp_execute_actions(void *dp, struct dp_packet **packets, int cnt, bool steal,
return;
}
}
break;
continue;
}
switch ((enum ovs_action_attr) type) {
case OVS_ACTION_ATTR_HASH: {
const struct ovs_action_hash *hash_act = nl_attr_get(a);
@@ -578,6 +606,11 @@ odp_execute_actions(void *dp, struct dp_packet **packets, int cnt, bool steal,
}
break;
case OVS_ACTION_ATTR_OUTPUT:
case OVS_ACTION_ATTR_TUNNEL_PUSH:
case OVS_ACTION_ATTR_TUNNEL_POP:
case OVS_ACTION_ATTR_USERSPACE:
case OVS_ACTION_ATTR_RECIRC:
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
OVS_NOT_REACHED();